Blogger / WordPress.com Blogs and Indexing?

So I think I have a couple good keywords that can get me a good bit of traffic since I did the exact same kind of research a couple weeks ago and the site started making $40 a day without any work after being sold. So now I am wondering do Blogger and WordPress.com blogs which are hosted free can index just as good as a .net domain?

Could someone give me the answer? I just want to do this till I have some extra spare cash to buy the keyword rich .net domains but don't want to waste time and they not index like a regular domain.

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